The Artemis Module from SparkFun is a Cortex-M4F with BLE 5.0 running up to 96MHz and with as low power as 6uA per MHz (less than 5mW). The flexibility of the Artemis module starts with our Arduino core. You can program and use the Artemis module just like you would an Uno or any other Arduino.
Resources
Schematic
Eagle Files
Artemis Integration Guide
Designing with the SparkFun Artemis
Artemis Development with Arduino
Arduino Core
Artemis Info Page
GitHub Hardware Repo